Sun GlassFish Enterprise Server v3 Administration Guide

Additional Domain Tasks

The following topics are addressed here:

ProcedureTo Display Domain Uptime

Use the uptime subcommand in remote mode to display the length of time that the domain administration server (DAS) has been running since it was last started.

  1. Ensure that the server is running.

    Remote subcommands require a running server.

  2. Display uptime by using the uptime(1) subcommand.

Example 3–11 Displaying the DAS Uptime

This example displays the length of time that the DAS has been running.

asadmin> uptime
Uptime: 1 Weeks, 4 days, 0 hours, 17 minutes, 14 seconds, Total milliseconds: 951434595
Command uptime executed successfully.

See Also

You can also view the full syntax and options of the subcommand by typing asadmin help uptime at the command line.

ProcedureTo Switch a Domain to Another Supported Java Version

Enterprise Server v3 requires Version 6 Java SE platform as the underlying virtual machine for the JavaTM platform (Java Virtual Machine or JVMTM machine).

Note –

Do not downgrade to an earlier Java version after a domain has been created with a newer JVM machine. If you must downgrade your JVM machine, downgrade it only for individual domains.

  1. If you have not already done so, download the desired Java SDK (not the JRE) and install it on your system.

    The Java SDK can be downloaded from

  2. Start the domain for which you are changing the JDK.

    Use the following format:

    as-install/bin/asadmin start-domain domain-name

    For a valid JVM installation, locations are checked in the following order:

    1. domain.xml (java-home inside java-config)

    2. asenv.conf (setting AS_JAVA="path to java home")

    If a legal JDK is not found, a fatal error occurs and the problem is reported back to you.

  3. If necessary, change the JVM machine attributes for the domain.

    In particular, you might need to change the JAVA_HOME environment variable. For example, to change the JAVA_HOME variable, type:

    as-install/bin/asadmin set ""